反应详情

A mixture of 0.279 g of 4-chloro-6,7,8trimethoxy-quinoline-3-carbonitrile, 0.177 g of 4-chloro-2-fluoroaniline, and 10 ml of ethoxyethanol was stirred under nitrogen, at reflux temperature for 30 minutes. The mixture was cooled and added to 100 ml of water. To this mixture was added sodium carbonate to pH 9. The product was extracted with ethyl acetate, washed with water, dried and concentrated in vacuo. The solid thus obtained was chromatographed on silica gel eluting with hexanes-ethyl acetate 9:1 to 2:1. Solvent was removed from product fractions giving 0.261 g of 4-(4-chloro-2-fluoro-phenylamino)-6,7,8-trimethoxy-quinoline-3-carbonitrile as a yellow solid: mp 166-168° C.; mass spectrum (EI, m/e): M 387.0777.

1. temperatureat reflux temperature for 30 minutes
2. temperatureThe mixture was cooled
3. extractionThe product was extracted with ethyl acetate
4. washwashed with water
5. customdried
6. concentrationconcentrated in vacuo
7. customThe solid thus obtained
8. customwas chromatographed on silica gel eluting with hexanes-ethyl acetate 9:1 to 2:1
9. customSolvent was removed from product fractions